Choose which statement describes a process in which an external force does negative work on the system. Maya is not part of the system. Maya lifts her bag up to place on her shoulder. The system is the bag and Earth. Maya holds her bag on her shoulder while she stands still and talks to a friend. The system is the bag. Maya lowers her bag to the ground when she gets home. The system is the bag and Earth. Maya walks across a level street with her bag on her shoulder at a constant speed. The system is the bag

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